Question

Please Hurry !!

Answer 1

Answer:

d = 711 miles

Step-by-step explanation:

The speed s of the car is given by :

$s=3\sqrt{d}$ ...(1)

Where

d is the stopping distance

We need to find the stopping distance of a car travelling at 80 mph.

Rearranging equation (1) for d.

$s^2=9d\\\\d=\dfrac{s^2}{9}\\\\d=\dfrac{80^2}{9}\\\\d=711.1\ miles$

or

d = 711 miles

So, the required stopping distance is 711 miles.